Preheat your oven to 350°F (175°C).
In a bowl, whisk together flour, baking soda, and salt.
In a separate bowl, cream together the softened butter, brown sugar, and granulated sugar.
Mix in the Biscoff spread and vanilla extract until combined.
Add the egg and mix until fully incorporated.
Gradually add the flour mixture to the wet ingredients, mixing until just combined.
Fold in the chocolate chips using a spatula or wooden spoon.
Scoop tablespoon-sized dough balls onto a lined baking sheet, spacing them apart.
Bake the cookies for 10-12 minutes, until edges are golden.
Let the cookies cool on the baking sheet for about 5 minutes before transferring them to a wire rack.